JP2003317902A - Heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heater which is not damaged even when an external force is applied to an electrode. <P>SOLUTION: A heater comprises a plate-like metal 1 having a surface on which a coating material 2 including electric insulation is applied and fired and then a conductor 3 composed mainly of silver is printed and fired, and an electrode 6 which is made of metal and mounted on an end part of the conductor 3. A voltage supply part 4 at the end part of the conductor 3 is constituted by a pattern of the conductor 3 which is made approximately circle and a circular hole 5 provided at a center part, and the electrode 6 is constituted by an approximately cylindrical cylinder part 6a and pin-like threaded part 6b formed at the center part in a direction parallel with the cylinder part 6a. In order to press-bond the cylinder part 6a of the electrode 6 to the voltage supply part 4, the threaded part 6b is inserted through a hole which is penetrating the metal 1 via the circular hole 5 of the voltage supply part 4. Then the threaded part 6b of the electrode 6 is fastened by a hole part 7a passing through the threaded part 6b of the electrode 6 at the center part, an insulation material 7 having a cylindrical wall 7b provided at an outer peripheral of one direction of the hole part 7a, and a nut 9 through a plane washer 8. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an electric heating component, and more particularly to a heating element for heating used in a fish roaster part of a cooking heater for household electric appliances.

[0002]

2. Description of the Related Art Conventionally, an electrode of a sheet-like heat generating element obtained by printing and firing a conductor of this kind has been disclosed in Japanese Patent Application Laid-Open No. 11-40330. Either the terminal pins were joined with solder, or they were joined with silver solder or the like.

This conventional example will be described with reference to FIG. A silver-lead sintered body 15 is baked on a heater plate 18 made of a ceramic plate to form a pattern, and a metal coating layer 16 is deposited on the surface to form a heating element. Further, a solder layer 17 is formed on a portion to which the terminal is attached in order to secure the connection with the power source, and the terminal pin 14 is formed on the solder layer 17.
Is placed and heated, and the terminal pin 14 is attached and joined to the surface of the heating element.

[0004]

The above-mentioned FIG.
1-40403), a conductor including a solder layer for holding electrodes (terminal pins), a metal coating layer, and a sintered metal particle has a number of 1
Since the thickness is as thin as 00 μm, there is a drawback that when an external force is applied to the electrode, the conductor is peeled off from the substrate and disconnected, which makes heat generation impossible.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above drawbacks. The electrode mounting structure is such that the conductor is always pressed against the substrate so that the conductor can be removed from the substrate even when an external force is applied to the electrode. It was assumed that the wire did not peel off and could not generate heat.

Specifically, a metal electrode is composed of a substantially cylindrical tubular portion and a screw portion formed in the central portion in the shape of a pin in a direction parallel to the tubular portion. In order to press the cylindrical portion of the electrode into pressure-like voltage supply portion, the screw part of the electrode is passed through a hole penetrating the metal of the heating element, and the hole part for penetrating the electrode screw part in the center part and one direction of the hole part The structure is such that the threaded portion is tightened with a nut via an insulating member having a cylindrical wall on the outer periphery and a flat washer.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, a paint having an electric insulating property is applied and baked on the surface of a flat metal, and a conductor containing silver as a main component is printed and baked on the paint. In a heating element having a metal electrode attached to the end, the voltage supply portion at the end of the conductor has a substantially circular pattern of the conductor and is provided with a round hole in the center, and the electrode is substantially It is composed of a cylindrical tubular portion and a pin-shaped screw portion formed in a central portion in a direction parallel to the tubular portion, and the screw portion is a circular portion of the voltage supply portion so that the tubular portion of the electrode is pressed against the voltage supply portion. Through a hole that penetrates the metal through the hole, and further through a hole portion that penetrates the screw portion of the electrode in the center portion, an insulating member provided with a cylindrical wall on the outer periphery in one direction of the hole portion, and a flat washer. A heating element is constructed by tightening the screw part of the electrode with a nut.

According to a second aspect of the present invention, a coating having an electrically insulating property is further applied and baked on the surface of the conductor to prevent the surface of the conductor from being oxidized and reduced to shorten the life when the heating element is used. Is.

According to a third aspect of the present invention, the electrode is made of brass (copper alloy) or iron alloy plated with nickel, and the contact resistance between the conductor and the electrode is increased by oxidation of the electrode surface due to heat generated during use. This is to prevent an increase in local heat generation or poor conduction.

According to a fourth aspect of the present invention, the insulating member is made of ceramic or tetrafluoroethylene resin so that the electrode screw portion is insulated from the flat metal, and the flat washer, the nut and the metal are fixed even when the electrode is fixed. Insulation is performed, and the insulating member is heat resistant and has a perfect insulating performance even when used for heat generation.

Further, according to the present invention, a cylindrical pin or screw is provided coaxially with the threaded portion on the cylindrical portion on the side opposite to the threaded portion of the electrode, whereby lead wires or the like are welded, soldered, or screwed. It is designed to be easily fixed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is an exploded perspective view of a heating element showing an embodiment of the present invention. 2 is a plan view of the same, and FIG. 3 is a sectional view taken along line AA of FIG. 4 is a sectional view taken along the line BB of FIG. 2 and is a detailed view of a main part.

In FIG. 1, FIG. 1 is a perspective view of a voltage supply portion of this embodiment, in which a metal 1 surface made of a flat stainless steel or the like is provided with a ceramic-based electrical insulating property up to 800.degree. The coating material 2 is applied and baked, and the conductor 3 containing silver as a main component is printed and baked thereon.

Reference numeral 4 denotes a voltage supply portion, which is an end portion of the conductor 3 and is a portion to which an electrode 6 described later is attached. The voltage supply portion 4 has a configuration in which the pattern of the conductor 3 is substantially circular and a circular hole 5 which is concentric with the hole penetrating the metal 1 is provided in the central portion.

Reference numeral 6 denotes a metal electrode, which is made of brass (copper alloy) or iron alloy plated with nickel in this embodiment. The electrode 6 is composed of a substantially cylindrical tubular portion 6a and a threaded portion 6b formed in the center in a pin shape in a direction parallel to the tubular portion 6a.

Reference numeral 7 denotes an insulating member, which is made of ceramic or tetrafluoroethylene resin, and has a structure in which a hole portion 7a and a hole portion 7a through which the screw portion 6a of the electrode 6 is penetrated in the central portion
A cylindrical wall 7b is provided on the outer periphery in one direction.

Reference numeral 8 is a flat washer, and 9 is a nut. Reference numeral 10 is a heating element composed of the above-mentioned components.

In the above structure, the screw 6b of the electrode 6 is used to attach the electrode 6 to the voltage supply portion 4 of the conductor 3.
Is inserted into the through hole of the metal 1 through the round hole 5 of the voltage supply portion 4. In this state, the hole portion 7a of the insulating member 7 is inserted into the screw portion 6b from below, the flat washer 8 is fitted, and then the nut 9 is tightened to the screw portion 6b. As a result, the tubular portion 6a of the electrode 6 can be pressed against the voltage supply portion 4, and the heating element 10 is completed in this state.

FIG. 3 is a cross-sectional view of the heating element 10, showing a state in which a coating 11 having an electrically insulating property is applied and baked while avoiding the voltage supply portion 4 on the surface of the conductor 3 of the heating element 10.

FIG. 4 is an enlarged cross-sectional view of a main part of the heating element 10. The electrode 6 has a screw portion 6a through a hole passing through the metal 1 of the heating element 10 in order to press the voltage supply portion 4 and the tubular portion 6a into contact with each other. The structure is such that the screw portion 6b is passed through the hole portion 7a of the insulating member 7 and is tightened with the nut 9 via the flat washer 8. Further, the screw portion 6b is provided on the opposite side of the electrode 6 from the screw portion 6b.
A cylindrical pin 12 or a screw 13 is provided coaxially with. By doing so, the power cord and the like can be easily welded, soldered, and fixed with screws.

[0021]

As described above, according to the present invention, the electrode mounting structure always causes a stress for pressing the conductor against the substrate, and even if an external force is applied to the electrode, the conductor peels off from the substrate and is disconnected. It will never be disabled.

Further, by coating and baking a coating having an electrically insulating property on the surface of the conductor, it is possible to prevent the surface of the conductor from being oxidized and reduced to shorten the life when the heating element is used.

Since the electrode is made of brass (copper alloy) or iron alloy and plated with nickel, the surface of the electrode is not oxidized by the heat generated during use and the contact resistance between the conductor and the electrode is increased. It is also possible to prevent local heat generation or poor conduction.

Further, by using ceramic or tetrafluoroethylene resin for the insulating member, the screw portion of the electrode is insulated from the flat metal, the flat washer is fixed when the electrode is fixed, and the nut is insulated from the metal. The insulating member is heat resistant and can obtain perfect insulating performance even when it is used for heat generation.

Further, by providing a columnar pin or screw coaxially with the threaded portion on the cylindrical portion on the side opposite to the threaded portion of the electrode, the lead wire or the like can be easily welded, soldered, or fixed by the screw. It will be like this.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a heating element showing an embodiment of the present invention.

FIG. 2 is a plan view of the same.

3 is an enlarged view of the section AA of FIG.

FIG. 4 is an enlarged view of a B-B cross section of FIG.

FIG. 5 is a cross-sectional view showing a heating element of a conventional example.

[Explanation of symbols]

1: metal, 2: paint, 3: conductor, 4: voltage supply part,
5: Round hole, 6: Electrode, 6a: Cylindrical part, 6b: Screw part, 7:
Insulating member, 7a: hole, 7b: wall, 8: flat washer,
9: Nut, 10: Heating element.

Continued front page    F term (reference) 3K034 AA10 AA28 AA34 AA37 BA06                       BA17 BB02 BB14 BC04 BC12                       CA02 CA20 CA28 CA40 FA35                       GA12 JA10                 3K092 PP20 QA05 QB02 QB32 QB75                       QC05 QC42 QC59 QC62 QC64                       RF09 RF17 RF22 TT19 VV29                       VV31                 4B040 AA02 AC03 AD04 AE13 CA05                       CB06 EA03

Claims (5)

[Claims] 1. A coating (2) having an electrical insulating property is applied and baked on the surface of a flat plate-shaped metal (1), and a conductor (3) containing silver as a main component is printed and baked on the coating (2). In a heating element in which a metal electrode (6) is attached to the end of the conductor (3), the voltage supply portion (4) at the end of the conductor (3) has a substantially circular pattern of the conductor (3). And a circular hole (5) is provided in the center, and the electrode (6) has a substantially cylindrical tubular portion (6a) and a pin-shaped electrode formed in the central portion in a direction parallel to the tubular portion (6a). And the screw portion (6b) of the electrode (6) so that the cylindrical portion (6a) of the electrode (6) is pressed against the voltage supply portion (4). ) Through a hole passing through the metal (1), and at the center of the screw (6) of the electrode (6).
b) through the hole (7a), the insulating member (7) provided with a tubular wall (7b) on the outer periphery in one direction of the hole (7a), and the nut (9) via the flat washer (8). At the electrode (6)
A heating element characterized by tightening the screw part (6b) of. 2. A coating (11) having electrical insulation is further applied and baked on the surface of the conductor (3).
The heating element described. 3. The electrode (6) is made of brass (copper alloy) or iron alloy plated with nickel.
The heating element described. 4. The heating element according to claim 1, wherein the insulating member (7) is made of ceramic or tetrafluoroethylene resin. 5. A columnar pin (12) or screw (13) is provided coaxially with the threaded portion (6b) on the tube portion (6a) opposite to the threaded portion (6b) of the electrode (6). The heating element according to claim 1 or claim 3.